Php 如何呼叫家长';s方法,该方法在子对象中重载
我有PHP代码Php 如何呼叫家长';s方法,该方法在子对象中重载,php,class,parent,superclass,super,Php,Class,Parent,Superclass,Super,我有PHP代码 <? class AParent { function to_s() { return $this->id; } } class AChild { public $id; public $name; function to_s() { if(!empty($this->name)) { $ret = $this->name; } else { $ret = /** call pa
<?
class AParent {
function to_s() {
return $this->id;
}
}
class AChild {
public $id;
public $name;
function to_s() {
if(!empty($this->name)) {
$ret = $this->name;
} else {
$ret = /** call parent's method to_s() */
}
return $ret;
}
}
使用
$ret=parent::to_s()
,这就足够了旁注:您可以移动public$id代码>对AParent
类的声明。
$a = new AChild();
$a->id = 1;
$a->name = 'Something';
echo $a; // Should echo "Something"
$b = new AChild();
$b->id = 2;
echo $b; // Should echo "2"